Purifying method of 1-ethyl-(3-dimethylaminophenyl)carbodiimide hydrochloride

The invention belongs to the technical field of organic chemical industry and specifically relates to a purifying method of 1-ethyl-(3-dimethylaminophenyl)carbodiimide hydrochloride. The purifying method comprises the following steps: adding a crude product of 1-ethyl-(3-dimethylaminophenyl)carbodiimide hydrochloride into an inert organic solvent, adding an inorganic base aqueous solution, and stirring to dissolve the crude product of 1-ethyl-(3-dimethylaminophenyl)carbodiimide hydrochloride in the system; standing for liquid separation, and extracting the water phase by use of the inert organic solvent; combining all organic phases; distilling and concentrating to obtain 1-ethyl-(3-dimethylaminophenyl)carbodiimide; enabling the 1-ethyl-(3-dimethylaminophenyl)carbodiimide to conduct a saltexchange reaction with hydrochloride in an aprotic polar solvent, to obtain 1-ethyl-(3-dimethylaminophenyl)carbodiimide hydrochloride. The purifying method increases the purity of the crude product,reduces solvent residue an